

public class DuckCall implements Quackable {
	/*Observable observable;
	 
	public DuckCall() {
		observable = new Observable(this);
	}
	*/
	public void registerObserver(Observer observer) {
	//	observable.registerObserver(observer);
	}
 
	public void notifyObservers() {
	//	observable.notifyObservers();
	}

	public void quack() {
		System.out.println("Kwak");
	//	notifyObservers();
	}
	
	public String toString() {
		return "Duck Call";
	}
}
